TREMATODES FROM FISHES — LINTON 



37 



and but 13 could be made out on the other. The folds of the uterus 

 may extend from the posterior end to the anterior sucker. The ova 

 have thickish shells, tend to be more or less bluntly pointed at one 

 end, and measure 0.018 by 0.01 mm. to 0.021 by 0.012 mm. 



Table 11. — Measurements of five specimens of Nannoenterum gorgon in lalsam 



Measurement 



Length-.- 



Breadth, anterior 



Breadth, middle 



Breadth, near posterior end. 



Anterior sucker, length 



Anterior sucker, breadth 



Anterior sucker to vitellaria. 

 Anterior sucker to uterus... 

 Diameter ventral sucker 



Aim. 

 3.08 

 .22 

 .33 

 .22 

 .21 

 .22 

 .87 

 .40 

 .08 



Host. — Great amberfish {Serlola lalandi). 



Record of collections. — Nine, collected August 14, 1906, 6 from in- 

 testine of host, 1 from pyloric ceca, 2 from stomach; all macerated. 



Ninety-eight (U.S.N.M. No. 8185), collected by Vinal N. Edwards, 

 September 20, 1910; three fishes examined. Dimensions in formalin: 

 Length, 3.29 mm. ; breadth, anterior 0.21 mm., middle 0.35 mm., pos- 

 terior 0.21 mm. ; length of tentacle 0.15 mm. ; ova 0.02 by 0.01 mm. 



Suborder Prosostomata Odhner, 1905 



Family ASPIDOGASTRIDAE Poche, 1907 



Genus STICHOCOTYLE Cunningham, 1884 



STICHOCOTYLE NEPHROPIS Cunningham 



Plate 19, Figures 257-259 



See Stiles and Hassaix, U. S. Hyg. Lab. Bull. 37, p. 3G4, 1908, for earlier 



literature. 

 SiicJwcotyle neplu-opis Odhneb, Kongl. Svenska Vetensk.-Akad. Haudl., vol. 45, 



No. 3, pp. 1-16 (reprint), 5 figs., 1 pi., 1910. 



A single specimen of this trematode (U.S.N.M. No. 8186) was 

 collected by Vinal N. Edwards from a barndoor skate {Raja laevis), 

 taken off Nantucket, June 4, 1906. 



The exact location of the worm in its host was not noted. The 

 immature, encysted stage of this trematode has been found in the 

 Norway and the American lobsters; the sexually mature stage has 

 been found in Europe in the liver and gall bladder of species of Raja. 



The specimen was stained and mounted in balsam. So far as the 

 anatomy can be made out it is in agreement with Odhner's descrip- 



